How is the circulatory system of insects characterized when compared to vertebrates?

Answer

It is an open system where hemolymph circulates more freely

Insects possess a simpler, open circulatory system where the hemolymph flows relatively unrestricted throughout the body cavity rather than being entirely confined within a network of vessels.

How is the circulatory system of insects characterized when compared to vertebrates?
insectstructureanatomyBoneinvertebrate